If percentage of overall gross margin is 15 and final sales value of whole production is $20000, then gross margin (in dollars) will be

The correct answer is A. $30,000.

To calculate the gross margin, we can use the following formula:

Gross margin = (Sales value) x (Percentage of overall gross margin)

In this case, we know that the sales value is $20,000 and the percentage of overall gross margin is 15%. So, the gross margin is:

Gross margin = ($20,000) x (15%) = $30,000

Option B is incorrect because it is the total sales value, not the gross margin. Option C is incorrect because it is twice the actual gross margin. Option D is incorrect because it is 20 times the actual gross margin.